Pressure-operated controlling-valve for house water-supply systems.



R. H. NELSON.

PRESSURE OPERATED CONTROLLING VALVE FOR HOUSE WATER SUPPLY SYSTEMS.

APPLICATION FILED APR.17, 1909.

Patented Apr. 2, 1912.

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UNITED STATES PATENT OFFICE.

ROBERT H. NELSON, OF DIXON, ILLINOIS, ASSIGNOR OF ONE-HALF T0 CHARLES A.ROBBINS, OF DIXON, ILLINOIS.

PRESSURE-OPERATED CONTROLLING-VALVE FOR HOUSE WATER-SUPPLY SYSTEMS.

To all whom it may concern Be it known that I, Ronmrr H. NnLsoN, a

citizen of the United States, residing at Dixon, Lee county, Illinois,have invented certain new and useful Improvements in Pressure OperatedControlling Valves for House WVater-Supply Systems; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to certain improvements in pressureoperatedcontrolling valves for house water supply systems; and relates moreparticularly to means for automatically controlling water elevatingmechanism in water supply systems for houses or wherever adapted tosupply water at distant points; and the objects and nature of myinvention will be readily understood by those skilled in the art in thelight of the following explanation of the accompanying drawingsillustrating what I consider my preferred embodiment from among otherarrangements and constructions within the spirit and scope of myinvention.

The invention consists in certain novel features in construction and incombinations or arrangements of parts as more fully and particularlydescribed and set forth hereinafter.

In the accompanying drawings :--Figure 1, is a somewhat diagrammaticalview illustrating my improved valve in a water supply system. Fig. 2, isa longitudinal section, on an enlarged scale, of the pressure regulatingor controlling valve. 7

In the drawings, a, is the water supply pipe from a cistern (6, to liftpump 2, by which the water is forced through pipe 7), to pressure tank3, from which the water is supplied through service pipe 0, to faucets0' (Z, is a water supply pipe from the pressure or city water main (1,to water motor 5, by which the pump 2 is driven. A pres sure servicepipe 6, for the city water supplies faucet e, and extends from the wasteor exhaust port of the motor 5. A water pipe or shunt connection g, isestablished between pipes d, and e. In this direct or shunt waterconnection 9, is included the casing of my improved automaticdifferential or pressure operated controlling valve. The pressurechamber of this valve is in di- Specification of Letters Patent.

Application filed April 17, 1909.

Patented Apr. 2, 1912.

Serial No. 490,622.

rect open comlminication with the cistern water house supply pipe orsystem 0, through the medium of a pipe h, from pipe (2, and opening intosaid chamber. valve casing has city water inlet opening 9, and outletopening 10, in which the sections of the pipe g, are secured. The casingis formed with a longitudinal or vertical water passage 11, extendingdown from inlet port 9, to outlet port 10, and intermediate said ports,the casing is formed with an internal annular valve seat 12.

A vertically movable reciprocating valve 13, is arranged within saidcasing below said seat 12, and adapted to move up against said seat andtightly close the passage 11, against flow of water through the casing,consequently closing or cutting off the direct or shunt pipe connectionr This valve is provided with valve stem 14, rigid therewith andextending upwardly therefrom longitudinally of the casing and at itsinner end fits in socket 15 in the center of the under side of enlargedhorizontal plate 15, hearing loosely against the under face of flexiblediaphragm 16 forming the floor or bottom wall of the pressure chamber17, into which pipe it, opens and which chamber receives the cisternwater from tank 3, and wherein the cistern water is under the samepressure as in the cistern water house-service pipe 0.

Suitable means is provided to normally and yieldingly hold the valve 13.to its seat under a certain predetermined pressure. For this purpose. Iemploy a coiled expansive spring, 18, arranged in the lower end of thepassage 11, of the valve casing and compressed between the under side ofvalve 13, and a head or abutment 19. on the upper end of adjusting screw20, adj ustablc through and carried by cap 21, screwed on and closingthe lower end of the casing.

Through the medium of screw 20, the tension of the spring on the valvecan be ad justed to the desired pressure to determine the pressure ofthe cistern water in the tank 3, necessary to open the valve 13. Theobject is to maintain the water in tank 3, at the pressure necessary toproperly supply water through pipe 0, and when through the medium ofpump 2, the desired quantity or pressure of water has been supplied intank 3, to open valve 13, so that city water flowing through pipes d and6, will not cause operation of the water motor but will be The i shuntedaround the motor by flowing through direct or cut-off pipe connection g.

The controlling pressure valve, shown in the specific exampleillustrated, comprises a depending cylindrical or tube-like casing 8,having the inlet and outlet openings 9 and 10, and forming thelongitudinal internal fluid passage 11, closed at the upper end. Thisvertical or reduced casing 8, can be formed integral with an outwardlyflared or bell-shaped flanged upper end 80, forming the lower half ofthe diaphragm shell of casing, the upper half of which is formed by thebell or flared flanged section 81, having a top inlet into which pipe h,is screwed or otherwise secured. The edge portion of the diaphragm isinterposed between the edge flanges of the sections 80, 81, so that thediaphragm spans the interior of the chamber formed by said shells andforms a partition completely shutting ofl the pressure chamber 17, fromthe space below the diaphragm. The two shells are fixed together andagainst the diaphragm to form a water tight joint by screws 82, or othersuitable means. Thefluid passage 11, is separated from the space inshell section 80, by a transverse wall perforated for the passage ofvalve stem 14. To prevent leakage of fluid from passage 11, into theshell below the diaphragm, I have provided packing 83, around said stemin a socket formed in and opening through the top of said transversewall. I internally screw thread this socket to receive a gland or nut84, by which the packing 83 can be tightened around the valve stem. Ialso usually provide means whereby the space in the shell and below thediaphragm is open to the atmosphere, for instance by vent or perforation85, through shell section 80. If water should leak around the stem. itwill be drained from the shell through said vent, and hence the pressurebelow the diaphragm will remain at that of the atmosphere and will notinterfere with the free and proper operation of the diaphragm.

It will thus be noted that the pressure of the cistern water in thehouse service pipe 0, or in pressure supply tank 3, is exercised againstdiaphragm 16 in a direction to tend to force valve 13, from its seat andpermit flow of city service water through cut-off or direct connection9.

I find that the controlling or pressure valve prevents pounding, jar orhammering of the water in the house pipes and of the pump and motorwhile in action, because, I presume, of the cushioning effect of thediaphragm and the spring 18, acting thereenlarged end and closed at itsopposite end,

a cap on said enlarged end having an inlet openin a diaphragm betweensaid enlarged end and cap, said casing having a water passage with aninlet and an outlet and an intermediate valve seat, and a partitionbetween said passage and said enlarged end, a valve to close said seatagainst the flow of water through said passage and having a stem rigidtherewith and extending into said enlarged end and slidable through saidpartition, an enlarged plate loosely and flatly resting against saiddiaphragm and having a center socket receiving the end of said stem,packing means for said stem accessible above said partition, and aspring between the closed end of the casing and said valve and holdingthe valve to its seat and 9 provided with exterior adjusting means.

2. A watersupply system controlling valve comprising a casing enlargedat one end, a cap on said end, a diaphragm between said end and cap,said cap having an inlet opening above said diaphragm, said casinghaving a longitudinal water passage with an inlet and an outlet and avalve seat between the same, and a partition closing said passage fromthe space in said end below said diaphragm, a cap closing the oppositeend of said casing, a reciprocatory valve to engage said seat and closesaid passage, a coiled spring below and holding said valve to its seat,spring adjusting means carried by and extending to the exterior of saidlast-mentioned cap, a valve-opening stem from said valve to saiddiaphragm and slidable through said partition, and a packing box in saidpartition having a gland accessible above said partition on the removalof said first mentioned cap and dia phragm.

In testimony whereofI atlix my signature, in presence of two witnesses.

ROBERT H. NELSON.

Witnesses H. A. BROOKS, C. A. ROBBINS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

